I Error Code Display - Zodiac Z250 MD3 Instructions For Installation And Use Manual

4.2 I Error code display

• : Actions to be performed by a qualified technician only.
If an error occurs, the
find the possible causes.
Display
(
Er20
IPM excessive current
(unit stops working)
If this error occurs 6 times in 60 minutes,
unplug the pump to clear the error.
(
Er20
Compressor failure
(unit stops working)
If this error occurs 6 times in 60 minutes,
unplug the pump to clear the error.
(
Er20
DC bus voltage too low
(unit stops working)
If this error occurs 6 times in 60 minutes,
unplug the pump to clear the error.
(
Er20 260
AC input voltage too high
(
Er20 264
AC input voltage too low
(
Er20 288
IPM temp too high
Er03
Lack or absence of water flow
If this error occurs 3 times in 30 minutes,
unplug the pump for 2 minutes to clear
the error.
Er04
Antifreeze protection
Er05
High pressure protection
If this error occurs 3 times in 30 minutes,
unplug the pump to clear the error.
21
icon is displayed and an error code replaces the temperature indications, see table below to
Possible causes
)
01
IPM module failure
)
02
Compressor failure
)
16
Input voltage too low/PFC module
failure
)
Input three-phase unbalance
)
Input voltage too low
• Fan motor failure
)
• Air duct blockage
Insufficient water in heat exchanger
Sensor disconnected or defective
Protection activated when the
ambient temperature is too low and
the appliance is on standby
Insufficient water flow
Excess refrigerant gas
Defective 4-way valve
High pressure switch disconnected or
defective
Solutions
Replace the inverter module
Replace the compressor
Check input voltage
Replace module
Check the input three-phases
voltage
Check input voltage
Check fan motor
Chack air duct
Check your water circuit
operation and the opening of the by-
pass valves
Reconnect or replace sensor
No intervention necessary
Check water pump operation
and openings of by-pass inlet/outlet
valves
Check and readjust the
refrigerant volume
Replace the 4-way valve
Reconnect or replace high
pressure switch